My wife and I purchased a house recently and the previous home owner is deceased. We have our washer and dryer in the basement and that is our main issue.
The drain goes under the basement floor and it actually has a few drain holes throughout the basement. Everytime my wife washes clothes the water backs up and comes up out of the drain holes into our basement. Sometimes she can wash 1 load.. sometimes 3 or 4 before it backs up.

How can I find out where the drain is stopped?

There is a possibility the drain was covered on the other end when we had our driveway installed but I can't be sure. How can I find out where the drain ends if it's covered up?

I used ... Rooter, twice in years gone by, and I never had a problem with them, and, the bills were reasonable. Since, the last time, I had to have the drain declogged, I have been using copper sulfate and no more root problems. Well, at least for me, my clog were roots from some very large, 90 foot trees.

The most likely problem is a clogged drain line. You should call a plumber who do not have Rooter as part of his name, to auger the line. It is possible that roots could be partly to blame, but the first step is to clean the line. Do not even consider chemical drain openers or DIY snakes. The auger needed for the job is large and can be very dangerous for a novice to use. You probably couldn't even get one in the first place. Chemicals will only create a hazard for the plumber when you eventually call him. This is not to say that some products intended to keep roots out of the line might not be effective after the line is cleared would not work, but first they need to be cut out and the line cleared all the way to the end.

I maybe wouldn't use the one with Rooter in his name, lol, for other things... but, they are good for drains, I used them. NOW, on the other hand, I had some mighty fine plumbers in here for other things, where I had direly, wished I had used the other guy with Rooter in his name. Seriously. Not all is bad, not all is ever good.

Since, I have used the copper sulfate OUTSIDE in the drain, never inside I have been virtually clog-free. WHAT a relief. It is horrible when you have to bang your clothes on a rock to clean them,

Mode of ActionDichlobenil molecules are taken up by rootsand transported throughout the plant.3 Insidethe plant, dichlobenil inhibits actively dividingcells by disrupting the formation of the cell plate,a structure which forms during cell division toseparate the two new cells.4 ​

So, it tells me, that chart to the link is WRONG. This is bad stuff and homeowners and plumbers are using it thinking it is not thanks to the great state of Ca.

What? I thought you made that law!
I was just pointing out that RootX is really not any better than copper sulfate, and it is pretty documented in those links. Why the great state of Ca does what it does only those in charge knows the reasons why. But, it is nice when the people knows some of the truth. It is really misleading the public to think one is safer than the next. Just my 2 cents worth for what it is worth to anyone.

God, I wish I made the laws.

All plumbers would get free chocolate chip cookies at their local bakery.

Since you don't know where it goes why not just connect your laundry waste into your plumbing waste pipe. Probably a lot cheaper than screwing around with cameras and everything else.

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I would get some one to clean it with a camera and locator. If it does go into the perimeter drain or french drain as we call it here, I would get it figured out. If that drain is plugged it could cause other problems and still needs to be fixed.